Barvirus is a White Magic spell in Final Fantasy XI. It may be learnt by Red Mages at level 39. When cast, the player's resistance to the Virus status will be increased, decreasing the duration that the player is afflicted by the status effect. It may be recast every 10 seconds for 25 MP, and, like all Enhancing magic, its effectiveness depends on the player's Enhancing Magic skill. Those using White Mages have access to an upgraded version, Barvira.